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CN106132599B 雾化金属粉末的制造方法 有权

雾化金属粉末的制造方法
摘要：
对熔融金属流喷射液温10℃以下、喷射压力5MPa以上的喷射水，将该熔融金属流分离而制成金属粉，并且对该金属粉进行冷却，制成水雾化金属粉末。使用液温10℃以下、喷射压力5MPa以上的喷射水的冷却从冷却开始时成为没有膜沸腾区域、在过渡沸腾区域的冷却，能够促进冷却，能够简便地进行直到可使金属粉末无定形化的快速冷却。另外，也可以喷射非活性气体进行熔融金属流的分离，使用液温10℃以下、喷射压力5MPa以上的喷射水进行分离了的金属粉的冷却，制成气体雾化金属粉末。应予说明，在对分离了的金属粉的喷射水冷却时，优选在金属粉的温度达到MHF点以下后进行。
摘要（英）：

A water-atomized metal powder is produced by dividing a molten metal stream into a metal powder by making injection water having a liquid temperature of 10° C. or less and an injection pressure of 5 MPa or more impinge on the molten metal stream and cooling the metal powder. Cooling with injection water having a liquid temperature of 10° C. or less and an injection pressure of 5 MPa or more enables can be performed not in the film boiling region but in the transition boiling region from the beginning of cooling. A gas-atomized metal powder may also be produced by dividing a molten metal stream into a metal powder by making an inert gas impinge on the molten metal stream and cooling the metal powder with injection water having a liquid temperature of 10° C. or less and an injection pressure of 5 MPa or more.

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